Jamar TRAX Apollyon Plus II, User Manual

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TRAX Apollyon Plus II User’s Manual
4-2
Layouts for the TRAX Apollyon Plus II
The TRAX Apollyon Plus II is equipped with six pre-programmed layouts
for recording traffic data. These are designated as L1 through L6 and rep-
resent the most common types of layouts used to record traffic data.
The following are descriptions of each of the layouts and the type of data
that can be collected with each. Each layout is different, but there are some
common principles that should be used with any layout that is chosen.
• The condition of the road tubes, and the manner in which they are
installed, are critical to achieving good results. Refer to Chapters 3 & 4
for more installation information.
• A tube length of 40 to 50 feet is recommended for mini tube, depend-
ing on conditions.
• In all tube setups of more than one tube, the tube length from the end
of the road to the TRAX must be the same for all tubes.
• In all short tube, long tube layouts, the vehicle must strike the short
tube first.
• To collect class or speed data, a minimum of one foot of tube spacing
is required to achieve accurate results.
• For counts done in the Volume Only mode, the TRAX Apollyon Plus
II will either do a straight axle count or use the divide-by-two technique
(in which every two axle hits will increment the TRAX Apollyon Plus
II by one).
• Data can be collected in the Basic mode with any of the tube layouts,
since basic data is essentially a collection of all the sensor activations on
an individual basis. However, the minimum tube spacing requirements
still apply to Basic data. If a layout says volume only, that is the only
information you will be able to accurately get from it. You can collect
data in the Basic mode with an L1 layout, but you will only be able to
get volume data, not class or speed.
The diagrams for the following layouts assume a length of twelve feet per
lane of traffic.